Now that I'm playing on Realms (so am no longer the host) it now happens to me as well on long rail trips.
I made a new track heading north (~400 blocks) and travelling it the minecart stopped dead about half way along - didn't bounce, just dead stop.
Had to destroy cart and place back on the track again to continue.
Seems to occur more when there is more than one player on the server, and they're not together.
Jonathan Chote
MCPE-144655
BDS-17583
Now that I'm playing on Realms (so am no longer the host) it now happens to me as well on long rail trips.
I made a new track heading north (~400 blocks) and travelling it the minecart stopped dead about half way along - didn't bounce, just dead stop.
Had to destroy cart and place back on the track again to continue.
Seems to occur more when there is more than one player on the server, and they're not together.
Xbox One S, 1.17.40 on Realms (4 chunks).